Pith Number

pith:ZK73M4KX

pith:2015:ZK73M4KXJHPQQBE7DZC3NEQD5L

not attested not anchored not stored refs pending

Unitals with many Baer secants through a fixed point

Geertrui Van de Voorde, Sara Rottey

arxiv:1503.05341 v1 · 2015-03-18 · math.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZK73M4KXJHPQQBE7DZC3NEQD5L}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T02:21:50.720639Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cabfb6715749df08049f1e45b69203ead4d67724b4acef16c54a567958d2aa53

Aliases

arxiv: 1503.05341 · arxiv_version: 1503.05341v1 · doi: 10.48550/arxiv.1503.05341 · pith_short_12: ZK73M4KXJHPQ · pith_short_16: ZK73M4KXJHPQQBE7 · pith_short_8: ZK73M4KX

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/ZK73M4KXJHPQQBE7DZC3NEQD5L \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: cabfb6715749df08049f1e45b69203ead4d67724b4acef16c54a567958d2aa53

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3d06cbaf3ed786b7302d8b2b00ce6b699d67a3551281695b69c5dbe5a965ee35",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-03-18T11:07:45Z",
    "title_canon_sha256": "210c51c4f206b6d30a040805cf090029263d513f79dfc4385e77749a34a8bc0d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.05341",
    "kind": "arxiv",
    "version": 1
  }
}